serialize

Write the data content of this BIFF record. The 'ushort sid' and 'ushort size' header fields
have already been written by the superclass.

The number of bytes written must equal the record size reported by
RecordBase.getRecordSize()} minus four
( record header consisting of a 'ushort sid' and 'ushort reclength' has already been written
by their superclass).